(CNN) - The Roman Catholic Church is cutting off funds to the community organizing group ACORN, citing complaints over its voter registration drives in the November 4 election as part of the reason.

The Catholic Campaign for Human Development froze its contributions to the group in June amid allegations that Dale Rathke, the brother of ACORN founder Wade Rathke, had embezzled nearly $1 million.

This week, as the U.S. Conference of Catholic Bishops met in Baltimore, Maryland, the campaign's chairman said it was cutting all ties with the group.

"We simply had too many questions and concerns to permit further CCHD funding of ACORN groups," Roger Morin, the auxiliary bishop of New Orleans, Louisiana, told his colleagues in a letter to the conference.

The CCHD has donated more than $7.3 million to ACORN-related projects over the past decade, including $40,000 to an ACORN chapter in Las Vegas, Nevada, that was raided before the election in an investigation into fraudulent voter registration forms. Among other questionable documents, the ACORN chapter submitted registration forms for members of the Dallas Cowboys football team.